thumb|Jon Fält (2025) thumb|Jon Fält (2016) thumb|Jon Fält on stage with Bobo Stenson at the Stockholm Jazz Festival 2010. Jon Fält (born 28 August 1979 in Gävle, Sweden) is a Swedish drummer in moder
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30026021b2dbec2849ae039639dd152961dc705ca9579a09c117fcbf5cebd559. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/94ecbae9-0aa1-4b98-9ac2-696fe535d1bd.json and https://artists.proofprofile.net/proofs/artist/94ecbae9-0aa1-4b98-9ac2-696fe535d1bd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2fd5c4b5de339dce011c0a5f6cac9b7278caa669165d2b78b0001db5f119073. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB330702301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea12bd41c0e56658ef85df96b2cbf82f44f204414ef1ec76c3405213f3f25ab. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB330702302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8987eaf09c2929e6b7572986081b084b1beeefb75f59cb725e3c31c8bca8ff49. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB330702303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaf38f3e72506dbf9a33de88a2cc6e641ccb6773f4f752e9ff22ab8124db5e97. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB330702304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe145dc303b5af54e3b9a65e0d37b2f564da6f49b261cf560ced533988c600fb3. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB330702305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc07ae61e9ba87c3af63800a3ae390469eb3a0810a8fc9ee285a00e1bd5fbdd2b. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB330702306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70c3c31a842dc8f89b7d85e78587cd6d4dfb0786ed02e1afa4b710401930421a. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB330702307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x194fea309e2f01b1508ec3d2323bf6411e60e4cf518085322952495e1a9844bf. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB330702308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ece715ada23685ce9fa9be4caaa26986267e2e92bc842e3866f9c2ad02ff0ed. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB330702309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57782fe86301d1dac939c78ab2556a0a92b3148f7092cd5c3df17a88f835fab8. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB330702310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5c2e856ee878d4ff393d57b82848ec5e1355517350ae52ecf651da0b97e9d28. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB330702311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4adf562fe6ccabf90c1082772f0747e467d50dfafb75253b4a84ee8afbacb8dc. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US8JA2051001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa68f105745e64d1be7dec58e0a9bb6d6e373f50deae6d9d4d93cd4729ae7b911. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US8JA2051002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8571c296a06b5af23141375789b4e45fb5cb98a31207f2915a0890d6b73e2d1. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US8JA2051003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf25fe0b0cbc89c864c3deffb6bf37975b8b4441448341f88f31a82eb8655d78e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US8JA2051004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36c8e5a4c6955d9083cd2829abb98d500896429b321bfb8b22a757635d596cab. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US8JA2051006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c1577bd803bd194cc04b56229e7a5e454ec52e35430659de359cdde70e382e3. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US8JA2051007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b5264ae7d2f553496c9be83262d309a3a81d9672fb38523208170571cb48c0b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US8JA2051008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x129c6cbaa6feadbc856844a03c0b7dee1a74730b31567a1fde486b426b79f4f8. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US8JA2051009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0619e25f002307ca323b14c052a7c64e63dd9683ef5433a0d7902f44b9f9d57f. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US8JA2051011.